C++ TDC::SetBkMode方法代码示例

//
/// Override TWindow virtual member function to paint the control.
//
void
TUrlLink::Paint(TDC& dc, bool /*erase*/, TRect& /*rect*/)
{
  TPointer<TFont>  tmpFnt; // Object wrapping font handle
  TAPointer<tchar> text;   // Pointer to caption dynamic buffer
  // Select the font
  if(!LinkFont){
    HFONT hFont = HFONT(::SendMessage(::GetParent(*this), WM_GETFONT, 0, 0));
    if (!hFont)
      hFont = HFONT(GetStockObject(ANSI_VAR_FONT));
    if (hFont)
      tmpFnt = new TFont(hFont);
  }
  if (LinkFont) {
    CHECK(LinkFont->IsGDIObject());
    dc.SelectObject(*LinkFont);
  }
  else if (tmpFnt) {
    CHECK(((TFont&)tmpFnt).IsGDIObject());
    dc.SelectObject((TFont&)tmpFnt);
  }
  int len = GetWindowTextLength();
  text = new tchar[len+1];
  GetWindowText(text, len+1);
  TRect textRect;
  GetClientRect(textRect);

  TColor textColor = LinkColor;
  if (bOverControl)
    textColor = HoverColor;
  else if (bVisited)
    textColor = VisitedColor;

  TColor oldColor = dc.SetTextColor(textColor);
  int oldMode = dc.SetBkMode(TRANSPARENT);
  dc.DrawText(&text[0], len, textRect, 0);
  dc.SetBkMode(oldMode);
  dc.SetTextColor(oldColor);

  // Restore font
  if (LinkFont || tmpFnt)
    dc.RestoreFont();
}

/////////////////////////////////////////////////////////////////////
// TInfoControl
// ------------
//
void TInfoControl::Paint (TDC& dc, BOOL erase, TRect& rect)
{
	TControl::Paint(dc, erase, rect);

	TRect cRect = GetClientRect();

	// Select font
	dc.SelectObject (*StaticFont);
	dc.SetBkMode (TRANSPARENT);

	// Draw each text line
	if ( TextLineTab != NULL )
	{
		for (int i = 0 ; i < NumLines ; i++)
		{
			if (TextLineTab[i] != NULL  && TextLineTab[i]->Text != NULL)
			{
				int x;

				dc.SetTextColor ( TMapDC::GetColor16(TextLineTab[i]->Color));
				dc.SetTextAlign( TextLineTab[i]->Align);

				switch (TextLineTab[i]->Align & (TA_CENTER |TA_LEFT |TA_RIGHT))
				{
				case TA_LEFT:
					x = 0;
					break;
				case TA_CENTER:
					x = cRect.Width() / 2;
					break;
				case TA_RIGHT:
					x = cRect.Width() - 1;
					break;
				}

				dc.TextOut( x, FontHeight * i, TextLineTab[i]->Text);
			}
		}
	}
	dc.RestoreFont();
}

void npredictMDIChild::Paint ( TDC& dc , BOOL , TRect& )
{
	int i, j, n, b, row, col, rstart, rstop, cstart, cstop, prevcol ;
	int xlab_height, xlab_width, ylab_height, ylab_width, wide ;
	int xlab_lw, xlab_rw, tick_height, font_height, r0, r1, c0 ;
	double xscale, yscale, xtickscale, ytickscale, *sig, val ;
   double x, xfac ;
	char msg[256] ;
	TRect rect ;
	SIZE size ;
	TColor bkgnd, *lines ;
	TBrush *brush ;
	TPen *pen, *second_pen ;
   TFont *font ;

	n = istop - istart + 1 ;
	sig = signal->sig ;
	
	dc.SetMapMode ( MM_TEXT ) ;
	dc.SetROP2 ( R2_COPYPEN ) ;
	dc.SetBkMode ( OPAQUE ) ;
	bkgnd = dc.GetNearestColor ( TColor ( background_color ) ) ;
	dc.SetBkColor ( bkgnd ) ;
	GetClientRect ( rect ) ;
	b = rect.bottom ;   // We use origin at bottom, so b-y adapts to Windows

/*
	Paint the background
*/

	brush = new TBrush ( bkgnd ) ;
	dc.SelectObject ( *brush ) ;
	pen = new TPen ( bkgnd ) ;
	dc.SelectObject ( *pen ) ;
	dc.Rectangle ( rect ) ;
	dc.RestoreBrush () ;
	delete brush ;
	dc.RestorePen () ;
	delete pen ;
		
/*
   Setup main drawing pen and secondary pen for hash lines
*/

   lines = new TColor ( 0 , 0 , 0 ) ;
	pen = new TPen ( *lines , 1 , PS_SOLID ) ;
	second_pen = new TPen ( *lines , 1 , PS_DASH ) ;

/*
	Compute the maximum height and width of the axis tick labels.
	This lets us position the graph optimally.
*/
	
	xlab_height = xlab_width = ylab_height = ylab_width = xlab_lw = xlab_rw = 0 ;
	
	font_height = rect.bottom / 20 ;
	if (rect.right / 24 < font_height)
		font_height = rect.right / 24 ;

	if (font_height < 8)
      font_height = 0 ;

	if (font_height) {
		font = new TFont ( "Helvetica" , font_height ) ;
		dc.SelectObject ( *font ) ;
   	for (i=0 ; i<xnticks ; i++) {
   		sprintf ( msg , "%*.*lf", xndigits, xnfrac, xmin + i * xdif ) ;
   		GetTextExtentPoint ( dc , msg , strlen(msg) , &size ) ;
   		if (! i)
   			xlab_lw = size.cx ;      // Width of leftmost x label
   		if (i == xnticks-1)
   			xlab_rw = size.cx ;      // And rightmost x label
   		if (size.cx > xlab_width)
   			xlab_width = size.cx ;
   		if (size.cy > xlab_height)
   			xlab_height = size.cy ;
   		}

   	for (i=0 ; i<ynticks ; i++) {
   		sprintf ( msg , "%*.*lf", yndigits, ynfrac, ymin + i * ydif ) ;
   		GetTextExtentPoint ( dc , msg , strlen(msg) , &size ) ;
			if (size.cx > ylab_width)
				ylab_width = size.cx ;
			if (size.cy > ylab_height)
				ylab_height = size.cy ;
			}

		tick_height = xlab_height / 2 ;
		}

	else {
		tick_height = rect.bottom / 64  +  2 ;
      font = NULL ;
      }

/*
   Last check on label display.  Are X-axis labels to wide?
*/

   if ((xlab_width * xnticks) > (3 * rect.right / 4)) {
//.........这里部分代码省略.........